MESON Chess Problem Database

Problem Display
PID: 16238 (3R4/7B/2bKp3/1N2r3/2p1PQPP/3k2NR/4p3/1n2B3 w - - 0 1)

Barnes, Barry Peter

The Problemist, 2000

3R4/7B/2bKp3/1N2r3/2p1PQPP/3k2NR/4p3/1n2B3

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5+
      • 2.exd5#
    • 1...Sd2
      • 2.Qxd2#
    • 1...Sa3
      • 2.Qd2#
    • 1...Sc3
      • 2.Qd2#
  • Tries
    • 1.Kxc6+?
      • 1...Rd5
        • 2.exd5#
        • 2.e5#
      • 1...Kc2!
    • 1.Sxe2+?
      • 1...Kc2
        • 2.Qc1#
      • 1...Kxe2!
    • 1.Sd4?
      • threat
        • 2.Sgxe2#
        • 2.Sgf5#
      • 1...Rd5+
        • 2.exd5#
      • 1...Kxd4
        • 2.Sxe2#
      • 1...Rxe4
        • 2.Sgxe2#
      • 1...Bxe4
        • 2.Sgxe2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Rf5
        • 2.Sgxe2#
        • 2.Sgxf5#
      • 1...c3!
    • 1.Qe3+?
      • 1...Kxe3
        • 2.Sh5#
      • 1...Kc2!
  • Keys
    • 1.Sa3!
      • threat
        • 2.Sf5#
      • 1...Rd5+
        • 2.exd5#
      • 1...Kd4
        • 2.Sxe2#
      • 1...Rxe4
        • 2.Kxc6#
      • 1...Bxe4
        • 2.Kxe5#
      • 1...Sxa3
        • 2.Qd2#
      • 1...Sd2
        • 2.Qxd2#
      • 1...Rf5
        • 2.Sxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(e);CHECK,OGATE::B(J)+P(D),XR(e)
    • S(a);N_GUARD::QAR1(E),XS(a)
    • S(a);N_GUARD::QAR1(E)
  • Tries
    • Try
      • K(I);CHECK,P-FLIGHT,XB(f)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(B);CHECK,XP(b)
      • Vars
        • K(c);S_FLIGHT::QAR1(E)
      • Refutation
        • K(c);S_FLIGHT,XS(B)
    • Try
      • S(H);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,OGATE::B(J)+P(D),XR(e)
        • K(c);P-FLIGHT,XS(H)::S(B),XP(b)
        • R(e);P_SPINR(e),XP(D)::R(C)+S(B),XP(b)
        • B(f);P_SPINB(f),XP(D)::R(C)+S(B),XP(b)
        • S(a);N_GUARD::QAR1(E),XS(a)
      • Refutation
        • P(d);
    • Try
      • Q(E);CHECK
      • Vars
        • K(c);P-FLIGHT,XQ(E)::R(C)+S(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(H);
    • Threat
      • R(C)+S(B)
    • Vars
      • R(e);CHECK,OGATE::B(J)+P(D),XR(e)
      • K(c);P-FLIGHT::S(B),XP(b)
      • R(e);N_GUARD,P_SPINR(e),XP(D)::R(K)+K(I),XB(f)
      • B(f);N_GUARD,P_SPINB(f),XP(D)::R(K)+K(I),XR(e)
      • S(a);N_GUARD,XS(H)::QAR1(E)
      • S(a);N_GUARD::QAR1(E),XS(a)
      • R(e);::R(C)+S(B),XR(e)
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